LXR linux/drivers/pci/hotplug/shpchp

   1/*
   2 * Compaq Hot Plug Controller Driver
   3 *
   4 * Copyright (c) 1995,2001 Compaq Computer Corporation
   5 * Copyright (c) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
   6 * Copyright (c) 2001 IBM Corp.
   7 *
   8 * All rights reserved.
   9 *
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License as published by
  12 * the Free Software Foundation; either version 2 of the License, or (at
  13 * your option) any later version.
  14 *
  15 * This program is distributed in the hope that it will be useful, but
  16 * WITHOUT ANY WARRANTY; without even the implied warranty of
  17 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  18 * NON INFRINGEMENT.  See the GNU General Public License for more
  19 * details.
  20 *
  21 * You should have received a copy of the GNU General Public License
  22 * along with this program; if not, write to the Free Software
  23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24 *
  25 * Send feedback to <greg@kroah.com>
  26 *
  27 */
  28
  29#include <linux/module.h>
  30#include <linux/kernel.h>
  31#include <linux/types.h>
  32#include <linux/pci.h>
  33#include "shpchp.h"
  34
  35
  36/* A few routines that create sysfs entries for the hot plug controller */
  37
  38static ssize_t show_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
  39{
  40        struct pci_dev *pdev;
  41        char *out = buf;
  42        int index, busnr;
  43        struct resource *res;
  44        struct pci_bus *bus;
  45
  46        pdev = to_pci_dev(dev);
  47        bus = pdev->subordinate;
  48
  49        out += sprintf(buf, "Free resources: memory\n");
  50        pci_bus_for_each_resource(bus, res, index) {
  51                if (res && (res->flags & IORESOURCE_MEM) &&
  52                                !(res->flags & IORESOURCE_PREFETCH)) {
  53                        out += sprintf(out, "start = %8.8llx, length = %8.8llx\n",
  54                                       (unsigned long long)res->start,
  55                                       (unsigned long long)resource_size(res));
  56                }
  57        }
  58        out += sprintf(out, "Free resources: prefetchable memory\n");
  59        pci_bus_for_each_resource(bus, res, index) {
  60                if (res && (res->flags & IORESOURCE_MEM) &&
  61                               (res->flags & IORESOURCE_PREFETCH)) {
  62                        out += sprintf(out, "start = %8.8llx, length = %8.8llx\n",
  63                                       (unsigned long long)res->start,
  64                                       (unsigned long long)resource_size(res));
  65                }
  66        }
  67        out += sprintf(out, "Free resources: IO\n");
  68        pci_bus_for_each_resource(bus, res, index) {
  69                if (res && (res->flags & IORESOURCE_IO)) {
  70                        out += sprintf(out, "start = %8.8llx, length = %8.8llx\n",
  71                                       (unsigned long long)res->start,
  72                                       (unsigned long long)resource_size(res));
  73                }
  74        }
  75        out += sprintf(out, "Free resources: bus numbers\n");
  76        for (busnr = bus->busn_res.start; busnr <= bus->busn_res.end; busnr++) {
  77                if (!pci_find_bus(pci_domain_nr(bus), busnr))
  78                        break;
  79        }
  80        if (busnr < bus->busn_res.end)
  81                out += sprintf(out, "start = %8.8x, length = %8.8x\n",
  82                                busnr, (int)(bus->busn_res.end - busnr));
  83
  84        return out - buf;
  85}
  86static DEVICE_ATTR(ctrl, S_IRUGO, show_ctrl, NULL);
  87
  88int shpchp_create_ctrl_files(struct controller *ctrl)
  89{
  90        return device_create_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);
  91}
  92
  93void shpchp_remove_ctrl_files(struct controller *ctrl)
  94{
  95        device_remove_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);
  96}
  97